But despite apparently rekindling their relationship, the pair are said to be worried about a possible backlash from fans.

A source told Laineygossip.com: "It was communicated to people during TIFF (Toronto International Film Festival) that they are [back together] but they're worried about how it might affect his career, like whether or not there will be some kind of crazy backlash."

Speaking at the premiere of her new film, On the Road, last week, Kristen insisted everything was rosy between her and her Twilight co-star, saying: "We're going to be fine. We're totally fine."